Underscore (original) (raw)

TOPICS

Algebra Applied Mathematics Calculus and Analysis Discrete Mathematics Foundations of Mathematics Geometry History and Terminology Number Theory Probability and Statistics Recreational Mathematics Topology

Alphabetical Index New in MathWorld

• History and Terminology
• Notation

A horizontal line placed under a symbol to indicate some special property. Underscores are sometimes used instead of over-arrows or bold typeface to indicate a vector, for example .

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More things to try:

• arcsin 2
• domain of f(x,y) = log(1-(x^2+y^2))
• Koch snowflake

References

Bringhurst, R. The Elements of Typographic Style, 2nd ed. Point Roberts, WA: Hartley and Marks, p. 286, 1997.

Referenced on Wolfram|Alpha

Underscore

Cite this as:

Weisstein, Eric W. "Underscore." FromMathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Underscore.html

Subject classifications

• History and Terminology
• Notation